Shearing-machine.



J. M. MAXWELL.

SHEARING MACHINE.

APPLICATION nun mm: 22, was

2 SHEETS-SHEET l Patented Aug. 31, 1909 Q vigyzaoea J. M. MAXWELL. SHEARING MACHINE.

APPLIEFATZON FILED 51;:1322, 190:1

Patented Aug. 31, 1909.

q vitncooea a Jams I. KAIWELL, F IOUNT OLIVER BOROUGH, PENNSYLVANIA.

SHE ARING-MAOBINE Specification of Letters Patent.

Patented Aug. 31, 1909.

Application filed June 22, 1908. Serial No. 439,738.

To all whom it may concern:

3e it known that I, J AMES M. Mann-ELL, a citizen of the United States of America, residing at Mount Oliver borough, in the county of Alleghen and State of Pennsylvania. have invente certain new and useful Improvements in Shearing- Machines, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to shear-i11 niachines, and the primary object of this invention is to provide a shearing machine that will be positive in its action, simple and durable in construction, and free from danger of injury by ordinary use.

Another object of this invention is to provide a shearing machine wherein novel means is employed for holding a piece of work being operated upon, thereby preventing the sheared edge of said piece of work from bending or becomiu distorted due to the. stresses and strains 0? the shearing action.

with the above and other objects in view which will more readily appear as the invention is better understood, the same consets in the novel construction, combination and arrangement of parts to be presently described and then specifically pointed out in the ap ended claims.

In t drawings:-Figurc 1 is a side elevation of a shearing machine embodyin my invention. Fig. 2 is a front elevation o? the same partly broken away. Fig. 3 is a vertical sectional view of the shearitfigniachine partly in elevation, Fig. 4- is a ierspective view of a work holding member. *ig. 5 is a horizontal sm-tional view taken on the line .r-:c of Fig. l. and Fig. (i is a perspective view of the shearing head.

To put my invention into practice, I provide a main cylinder 1 having a head 2 provided with a stnfiing box 3. To the head 2 is secured a plurality of standards 4 for a platform and upon this platform are erected four guides 6. said guides being braced by angle bars 7. The four guides 6 support a vertical auxiliary cylinder 8 and a super )oscd horizontal cylinder 9, said horizontnl cylinder conuuunicating with a large horizontal cylinder 10, both of which are secured to the upper end of the cylinder 8.

The cylinder 5) is provided with exhaust ports 11 and 12 and with inlet: orts 13 and 14-, said ports communicating iy pipes 15 and 16 with a suitable steam suppl pipe 17. The pipe 15 is provided with a drilling valve 18. while the pipe 16 is rovided with check valves 19 and 20, said 0 col: valves being of a'conventional form that, can be easil regulated to control the passage of steam t rough the pipe 16 in either direction.

Communicating with the cylinder 10 by a pipe 21 is a vertical reversing cylinder 22, this cylinder connectingb a pi e 23 with the steam supply pi e 17 he cy inder 22 is provided with an ex aust pipe24. Arranged in the cylinder 9 is a piston rod 25 having pistons 26, 27 and 28 within said cylinder and a piston 29 within the cylinder 10. Extendin through the cylinder 22 is a piston rod 30 having pistons 31. The rod 30 extends to one side of the cylinder 10 and down into the cylinder 8, as at 32, while the op osite end of the piston rod 30 extends t h the lower head or support 33 of the cyli iider 22, and to such a point that the same can be bent inwardly and upwardly through a stalling box 34 into the cylinder 8. tin; bend-of said rod 30 being formed with a loop 35 through which extends a lever 36 pivotally moiuited upon a bracket 37, carried by the lower head 38 of the cylinder 8. (See Figs. 1 and 2.)

In the cylinder 8 is a piston 39 having a piston rod 40 extending through a stu box 41 carried by the lower head 38 of salt cylinder. The piston rod 40 extends through a work holding member, comprisin a block 4! guided between the guides 6. 'l he block 4:2 is provided with a rear plate 43 and a front plate 44. the latter being adapted to engage a piece of work placed upon the flanged work rest -15 mounted upon t to plat form 5.

The lower end of the iiston rod 40 is provided with a shear head 46 having a shearing blade 47 adapted to actin con'unction with the shearing blade 48, carrie by the work rest'45 for shearin a piece of work. Adapted to engage the lower end of the shear head 46 IS a piston rod 49, said rod extendin' throu h the stufiing bog: 3 into the cylinder 1, w ere the end of said rod is provided with a piston head 50. p

The cylinder 8 is formed with a b pass 51, said by use minnniuicnt-ing with t 0 lower end of t to cylinder 8 by a. port 52, and with the cylinder 9 by u. eircumterentially arranged port 53, and a plurality of circumfcrentia ly arranged openings 54. The cylinder 8 is also in communication with the cylinder 9 b means of a passage 55, a circumferenti 1y arranged ort 56, and a plurality of circumferential y arranged openin 57. The lower head 38 of the c 'hnder 8 is rovided with a chamber 58, sax chamber ing provided with a depending cylmder 59 having a piston 60 arranged therein with a depending piston rod 61, said piston rod ing connected to the work holding member previously described. The chamber 58 is in communication with the cylinder 9 by a pipe 64. The by ass 51 communicates with the lower and o the cylinder 1 by a pipe 62, said pipe being bentto one side, as at 63 to permit of a piece of work being placed upon the rest 45. The cylinder 8 28 provided near its upper end with a port 65 which is connected by a pipe 66 to a port 67 formed in the cylinder 1 near the upper end thereof.

Operation In Fig. 3 of the drawings, the shearing machine is illustrated as takin steam into the cylinders 9, 10 and 22, an upon the left hand side of the pistons 26 and 28, and upon the right hand side of the piston 29. Since the piston 29 is of a greater area than the pistons 26 and 28, the piston rod 25 will be held in the position shown in Fig. since the piston 29 engages the end of the cylinder 10. The steam entering the cylinder 9 between the pistons 27 and 2S pames through openings 54, port 53 into the bypass 51. From this bypass the steam passes through port 52 into the cylinder 8 beneath the piston 39, and through pipe 62 to the c Iinder 1 beneath the piston 50. The sltaclzm lthat. is above the piston 39 exhausts t ug pi 55, rt 56, o nin s 57 an pi 12, wh il e the diieam abo g the piston 50 ex iausts through ort 67, pipe 66, port 65, and exhausts snni or to the steam contained in cylinder 8 above the piston 39. Since the steam is being admitted to the lower ends of the cylinders 1 and 8, the u ward movement of the pistons 39 and 50 e evates the shear head 46 and causes this head to engage the work holding member, which is also elevated; the steam within the cylinder 59 being forced into the chamber 58 and the pipe connecting therewith. As the piston 39 travels upwardly within the cylinder 8, it strikes the lower end 32 of the piston rod 30, causing this piston rod to elevate the pistons 31, cut 011' the supply of steam to the cylinder 10 and allow the steam therein to exhaust through pipe 21, cylinder 22 and pipe 24. The pressure of steam against the pistons 26 and 28 then forces the pistons 26, 27, 28 and 29 to the lil'ight, arid the steam from pipe 15 assest rou 11 he 0 nin 57, ort 56 and pipe 55 int?) the c lindti i' 8, ilso through port 65, pipe 66 an port 67, cans- 1 t c pistons 35) and 50 to travel downwardly. The steam from the pipe 16 entersea-ace ing the cylinder 9 passes through pipe 64 into the chamber 58 and the cylinder 59, forcing the piston 60 downwardly and placing the work holding member in sitive engagement with a piece of work, w ile the same is being operated upon. The steam upon the lower sides of the pistons 39 and 50 exhausts through pipes (i2, port 52, bypass 51, port 53, opcnim s 54, into the space between istons 26 and 27, and finally exhausts througi pipe 11. Upon the piston 39 striking the lower end 0 the piston rod 30, the pistons 31 are immediately elevated and the steam from pipe 23 enters the cylinder 10 and reverses the shearing machine, the operation being continuous as long as steam is suplicd to the pipe 17. When the shear head 46 descends and shears a piece of material, the work holding member is held in engagement with the material by the steam withm the cylinder 59 and the chamber' 58, this work holding member being of a suflicient weight, WlllCh together with the pressure of steam in the cylinder 59 and the chamber 58 is sufficient to prevent a piece of work from buckli or becoming distorted while being shea The adjustable check valves 19 and 20 are employed for regulating the pressure of steam in the end of the cylinder and a ainst the piston 26. The lever 36 is em' l oyed, whereby the vertical reciprocating s our head 46 can be retarded in its movement or stopped, this bein accomplished by moving the istons 31 either to admit steam to the cylin or 10 or permit said cylinder to exhaust, according to the direction in which the shear head is moved.

From the foregoing description it will be observed that I have devised a shearing machine wherein the horizontal cylinder 9 and its appurtenant arts constitute a sliding valve and the cy inder 22 and its appurte nant parts a reversing valve, the former controlling the admimion and exhaust of steam to and from the cylinders 1 and 8, while the latter controls the operation of the pistons 39 and 50.

While in the drawings forming a art of this a plication there are illustrated t. 1e preferred embodiments of my inrentioinl desire it to be understood that the elements therein may be varied or changed .as to the shape, pro ortion and exact. manner of assemblage wit out departing from the spirit of the invention.

Having now described my invention what I claim as new, isz- 1. A shearin machine embodying a main cylinder, a plat orm carried thereby, and vertical uidm mounted upon said platform, an auxiliary cylinder supported by said guides. horizontal cylinders supported upon said auxiliary cylinder, a vertical revcrsin cylinder supported by said auxiliary cylin er, a steam supply pipe comnmnicating with said horizontal cylinders and with said reversin cylinder, a piston rod mounted in said hOI'lzontal cylinders, pistons carried thereb exhaust pipes carried by said horizonta cylinders, a piston rod arranged in said vertical cylinder and havin its ends protruding into said auxiliary cylinder, a piston slidably mounted in said auxiliary cylinder, :1 piston rod carried thereby, a work holding member slidably mounted between said guides and adapted to be moved by said piston rod, a shear head carried by said piston rod and adapted to engage said work holding member, a work rest arranged upon said platform, a piston slidably mounted in said main cylinder, a piston rod carried thereby, and extending through said platform to en go said shear head, said auxiliary cylinder HIV- inga bypass formed therein, a pipe establislun communication between said b pass and te lower end of said main cylin er, a pipe establishing communication between the upper end of said main cylinder and the upper end of said auxiliary cylinder, a steam chamber arranged beneath said auxiliary cylinder and in communication with said main cylinder, a depending cylinder in communication with said chamber, a piston arranged in said cvlinder and connectin witlrsaid wor c holding member, one of sad horizontal cylinders havin circumferent-ially nrran ed ports formed tlicrein communicating with said auxiliary cylinder and bypass thereof, said horizontal cylinders having openings formed therein communicating with saidports, controlling valvw located upon said steam supply pipe, and a lever pivotally carried by said auxiliary cylinder for moving the piston rod of said reversing cylinder.

2. A shearin machine embodying a main cylinder, at platlorm carried thereby, and vertlcal guides mounted upon said plat-form, an auxiliary cylinder supported by said guides, horizontal cylinders supported upon said 5 auxiliary cylinder, a vertical reversing cylinder supported by said auxiliary cylinder, a steam supply pipe communicating with said horizontal cylinder and with said reversing cylinder, a piston rod mounted in said hori- 0 zoutal cylinders, pistons carried thereby, ex-

haust pipes carried by said horizontal cylinders, a piston rod arranged in said vertical cylinder and havin its ends protruding into said auxiliary cylinder, :1 )iston slidably mounted in said auxiliary cylinder, a piston rod carried lheieby, a work holding member slidably mounted between said guides and adapted to be moved by said piston rod. a shear head carried by said piston rod and adapted to engage said work holding memhclaawork rest arranged upon said platform, a piston slidubly mounted in said main cylinder, a piston rod carried thereby, and extending through said platform to engage said shear head, said auxiliary cylinder havin" a bypass formed therein, a pipe establis in communication between said b pass and t ie lower end of said main cylin er, a pipe establishing communication between the upper end of said main cylinder and the upper end of said auxiliary cylinder, a steam chamber arranged beneath said auxiliary cylinder and in communication with said main cylinder, a depending cylinder in communication with said chamber, a piston arranged in said cylinder and connectio with said work holding member, one of said horizontal cylinders having circumferentially arran ed ports formed therein communicatin with said auxiliary cylinder and bypass t ereof, said horizontal cylinders having openings formed therein communicating with said ports, and means carried by said auxiliary cylinder for moving the pistons of said re.- ve-rsiug cylinder.

3. A shearing machine embodying a main cylinder, a platform carried thereby, an auxi iary cylinder sup orted above said main cylinder, horizonta cylinders carried by said auxiliary cylinder, a reversin cylinder supported by said auxiliary cylinder, supply pipes communicating with said horizontal cy 'nders and said reversing cylinder, pistons movably mounted in all of said cylinders, a piston rod carried by the piston of said auxiliary cylinder, a shear head carried by said piston rod, a work holding member adapted to be moved I) said shear head. a piston rod carried by t e piston of said main cylinder and adapted to engage said shear head, said auxiliary cylinder having a bypass formed therein, a ipe establishing communication between sai vpass and the lower end of said main cylin er, a pipe establishing communication between the u per ends of said main cylinder and said auxiliary cylinder, one of said horizontal cylinders having ports formed therein for establishing communication between said cylindcis, said auxiliary cylinder and the bypass thereof, a depending cylinder supported from said auxiliary cylinder and in communication withsaid main cylinder, a piston located in said depending cylinder and connecting with said work hol ing member, means extending into said auxiliary cylinder and adapted to be actuated by the piston thereof for moving the pistons of said reversing cylinder, and means for controL ling the admission of steam to said horizontal cylinders.

4. A shearing machine embodying a mum cvlinder, a platform carried thereby, an auxiliary cylinder sup )orted above said mam cylinder, horizonta cylinders carried by said auxiliary cylinder, a reversing cylinder supported by said auxiliary cylinder, steam supply pipes comumnicating with said horizontul cylinders and said rcversin cylinder, pistons movably mounted in all 0 said cylsteam inders, a iston rod carried by the piston of said auxi iary cylinder, a shear head carried by said piston rod, a work holding member adapted to be moved by said shear head, a piston rod carried by the piston of said main cylinder and adapted to en age said shear head, said auxiliary cylinder aving a bypass formed therein, a pipe establishin communication between said b pass and the lower end of said main cylin er, a pipe establishing communication between the said main 0 linder and said auxiliary cylinder, one 0 said horizontal cylinders having ports formed therein for establishing communication between said cylinders, said auxiliary cylinder and the bypass thereof, :1. depending cylinder supported from said aux' iary cylinder and in communication with said main cylinder, 0. piston located in said depending cylinder and connecting with said work holding member, and means extendin into said auxiliary cylinder and ada t to be actuated by the piston thereof or moving the pistons of said revers' cylinder.

5. A s iearing machine com rising a main cylinder, an auxiliar cylin er, horizontal cylinders communicating with said auxiliary cylinder, a reversing cylinder communicating with said horizontal cylind steam supplv pipes communicating with said horizontal cylinders and with said reversing cylinder, pistons located in all of said cylinders, a shear head actuated by the pistons of said main cylinder and said auxiliary cylinder, :1 work holding member adapted to be moved by said shear head, said auxiliary cylinder having a bypass formed therein, a pi establishing communication between said ypa and the lower end of said main cylinder, a pipe establishing communication between the up 1' end of said main cylinder and said an mry linder, one of said horizontal cylinders fiving ports formed therein estab ishing communication between said steamsu ply pipes, said auxiliary cylinder and t e bypass thereof, a steam chamber in communication with said main cylinder, a depending cylinder in communication with said steam chamber, a piston located therein and connecting with said work holdin member, and means protruding into sai auxiliary cylinder for moving the pistons of said reversing cylinder.

6. A shearing machine com using a main cylinder, an auxiliary cylin er, horizontal cylinders, a. reversing c linder, a depending c linder, pistons locat in all of said cyliners, a shear head actuated by the pistons of said main cylinder and said auxiliary cylinder, 11 work holdin member adapted in be moved by said shear and and connecting with the pistons of said do nding cylinder, said auxiliary cylinder iaving a bypass formed therein, one of said horizontal cylinders ports formed therein communicating with said auxiliary cylinder and the bypass thereof, means for establishin communication between said main 0 lin er, auxiliary cylinder and depending cy inder, and means protruding into said auxiliary cylinder and adapted to be actuated by the piston thereof for moving the pistons of said reversing cylinder.

7 A shearing machine com rising a main cyl nder, an auxiliary cylin er, horizontal cylinders, a reversin cylinder, istons movably mounted in a of said cylinders, a shear head actuated by the pistons of said auxiliary c linder and said main cylinder, steam supp pipes connecting with said auxiliary cy m ers and said reversing cylinder, means for establish' communication between said main cylin er, auxiliary cylinder and horizontal c linders, and means protrndin into sai auxiliary cylinder and adapt to be actuated by the piston thereof for moving the pistons of said reversing cylinder.

8. In a shearing machine, a main cylinder, and an auxiliary cylinder, pistons in said cylinders, a. shear connected to the rod of the piston in said auxiliary cylinder, a work iolding member co-acting with said shear, a sliding valve mechanism controlling the admission and exhaust. of fluid to and from the main cylinder and the auxiliary cylinder, and a reversing valve mechanism controlling the o eraiion of the pistons in said main cylin er and auxiliary cylinder.

9. In a shearing machine, a main cylinder and an auxiliary cylinder, istons in sai cylinders, inlet ports and ust ports for said cylinders, a. shear connected to the rod of the piston in said auxiliary cylinder, a sliding valve mechanism controlling the admission and exhaust of fluid to and hem the main cylinder and the auxiliary cylinder, and a reversing valve mechanism controlling the o ration of the pistons in said main cylin er and auxiliary cylinder.

In testimony whereof I aflix my signature in the presence of two witnesses.

JAMES M. MAXWELL.

Witnesses:

Max B. Snonovnz, K. H. Burner. 

